silver97Z

P1441 - Evaporative Emission (EVAP) System Flow During Non-Purge -Chevrolet Only

Anyone know what the cause of this code is?

TIA

bobdec

Silver, I don't have first hand knowledge on this. but from what I have read there is a vac sensor on the CCP (Charcoal Canister Purge) system. If it detects vacuum when the CCP solenoid is not activated this code is forced. On my '95 the CCP solenoid and vacuum lines setup is on the pass (left) side of the intake manifold. However I can not vouch for the '96 setup. Maybe someone else can chime in and assist. ref shoebox " http://shbox.com/1/1996_evap.jpg "

shoebox

The vacuum switch (#11 in the diagram referenced above) is correctly or erroneously reporting vacuum in the line when there is no PCM call for it.

If it is correctly reporting vacuum, the EVAP solenoid is probably stuck open (easily checked with a vacuum gauge).

If it is erroneously reporting vacuum, the switch might be bad.

silver97Z

Thanks, I'll check it out!

djskiggz

Whats the EVAP solonoid?

Injuneer

Part #7 in the evap component diagram linked in the second post in this thread.